- galleryView: hoist Ctrl/Meta key handlers to module scope and remove them (plus a new blur reset) in teardownGalleryView(); disconnect the ResizeObserver; clear the ctrl-active body class; reset header-reveal state so a re-initialised gallery starts clean.
- overlay: make destroy() idempotent and make updateOverlayBounds() a no-op afterwards, so a pending rAF/ResizeObserver callback can't re-observe elements after disconnect().
Claude